FFmpeg Reader failed to find timing reference frame

[skoulik]

Hi,
This is a follow-up of #14
There is another video sample that produces unrecoverable error, but different from the previous one.
http://www.neatvideo.com/files3/testkit.zip

Tested on 6834972

[MrKepzie]

Seems to work fine here, do you still have the same problem ? If so on which platform ?

[skoulik]

I've just checked on 643f2c8, the issue is still reproducible on Windows 7, 64 bit.
Also reproducible with Natron 1.1 64 bit for windows: Add the clip to the graph with a Reader and cycle through the first 2-4 frames, you'll see the error message. The preview is black.
With Natron 1.2.1 64 bit for windows the issue us still there, but the error message is not persistent, I can see it flashing for a moment when I cycle through the first 10 frames. The preview is black.

[MrKepzie]

Have you tried using the snapshots of Natron 2.0 ?
It’s currently building but binaries should be back online for windows in about an hour.

On 16 Mar 2015, at 00:01, Sergey Koulik notifications@github.com wrote:

I've just checked on 643f2c8 643f2c8, the issue is still reproducible on Windows 7, 64 bit.
Also reproducible with Natron 1.1 64 bit for windows: Add the clip to the graph with a Reader and cycle through the first 2-4 frames, you'll see the error message. The preview is black.
With Natron 1.2.1 64 bit for windows the issue us still there, but the error message is not persistent, I can see it flashing for a moment when I cycle through the first 10 frames. The preview is black.

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Reply to this email directly or view it on GitHub #15 (comment).

[skoulik]

Unfortunately, I am not building Natron.
Here is a trace captured with
#define TRACE_DECODE_PROCESS 1
#define TRACE_FILE_OPEN 1
hope, this helps
1 streams:
FFmpeg stream index 0: Video decoder "mpeg1video" opened ok, getting stream properties:
Timebase=1/90000 s/tick
Duration=212400 ticks, 2.36 s
BitDepth=4
NumberOfComponents=3
Framerate=25/1, 25 fps
Image size=1280x720
Aspect ratio (from codec)=1
Determining stream start PTS:
Obtained from AVStream::start_time=41667 ticks, 0.462967 s
Determining stream frame count:
Obtained from AVFormatContext::duration & framerate=59
1 streams:
FFmpeg stream index 0: Video decoder "mpeg1video" opened ok, getting stream properties:
Timebase=1/90000 s/tick
Duration=212400 ticks, 2.36 s
BitDepth=4
NumberOfComponents=3
Framerate=25/1, 25 fps
Image size=1280x720
Aspect ratio (from codec)=1
Determining stream start PTS:
Obtained from AVStream::start_time=41667 ticks, 0.462967 s
Determining stream frame count:
Obtained from AVFormatContext::duration & framerate=59
1 streams:
FFmpeg stream index 0: Video decoder "mpeg1video" opened ok, getting stream properties:
Timebase=1/90000 s/tick
Duration=212400 ticks, 2.36 s
BitDepth=4
NumberOfComponents=3
Framerate=25/1, 25 fps
Image size=1280x720
Aspect ratio (from codec)=1
Determining stream start PTS:
Obtained from AVStream::start_time=41667 ticks, 0.462967 s
Determining stream frame count:
Obtained from AVFormatContext::duration & framerate=59
1 streams:
FFmpeg stream index 0: Video decoder "mpeg1video" opened ok, getting stream properties:
Timebase=1/90000 s/tick
Duration=212400 ticks, 2.36 s
BitDepth=4
NumberOfComponents=3
Framerate=25/1, 25 fps
Image size=1280x720
Aspect ratio (from codec)=1
Determining stream start PTS:
Obtained from AVStream::start_time=41667 ticks, 0.462967 s
Determining stream frame count:
Obtained from AVFormatContext::duration & framerate=59
mov64Reader=00000000056880A0::decode(): frame=0, videoStream=0, streamIdx=0
Next frame expected out=-1, Seeking to desired frame
Next frame expected in=unknown, Read OK, Packet data:
PTS=52467, DTS=41667, Duration=3600, KeyFrame=0, Corrupt=0, StreamIdx=0, PktSize=137744, Relevant stream
In seek (0), landing frame not found (landed after target at 3), can't seek before start, PTSs present, giving up
!!ERROR: FFmpeg Reader failed to find timing reference frame, possible file corruption
<-validPicture=0 for frame 0

[MrKepzie]

Natron 2 binaries are released as snapshots at every commit, see https://natron.inria.fr/snapshots/

[skoulik]

Tried Natron-03a73abe1eeeda2d178436f649df278d4a5677c7 for Windows 64 bit. The preview/playback or readers seem to be broken. Only first frame of the videos is displayed on preview. Preview does not refresh when I move cursor throu the timeline. Reproducible on any video I've tried, not only the one mentioned above.

[devernay]

see also MrKepzie/Natron#1244

[devernay]

see https://github.com/devernay/ffplay